Added a debug text in serial

src/app/IOManager.cpp

@@ -11,6 +11,6 @@ PCF8574 &IOManager::getPcf()
 
 void IOManager::setISROnIOChange(void (*isrFunc)(), Pin pin)
 {
-  pinMode(pin, INPUT);
+  pinMode(pin, INPUT_PULLUP);
   attachInterrupt(digitalPinToInterrupt(pin), isrFunc, FALLING);
 }

src/app/app.ino

@@ -103,6 +103,7 @@ void loop()
 
     sab.getScreenManager().displayView();
 
+    if(ioStateChange) Serial.println(F("ISR triggered"));
     ioStateChange = false;
   }